Abulug (Ibanag: Ili nat Abulug; Ilocano: Ili ti Abulug; Tagalog: Bayan ng Abulug), officially the Municipality of Abulug, is a municipality in the province of Cagayan , Philippines. According to the 2024 census, it has a population of 35,347 people.

Abulug was officially established as a Spanish mission in 1596. Originally called Tular, the name Abulug became commonly used after 1629.

The town became the base of Spanish expeditions against the unconquered Isneg tribes of Apayao. Since its founding, the town has had to change its location thrice, primarily due to the frequently changing course of the Abulog river.

Abulug is situated 128.06 kilometres (79.57 mi) from the provincial capital Tuguegarao, and 613.21 kilometres (381.03 mi) from the country's capital city of Manila.

Abulug is politically subdivided into 20 barangays.Each barangay consists of puroks while some have sitios.

In 1957, barrio Colonia was renamed to Libertad.

In the 2020 census, the population of Abulug, Cagayan, was 34,579 people, with a density of 210 inhabitants per square kilometre or 540 inhabitants per square mile.

Poverty incidence of Abulug